Topps x MetaZoo Cryptid Nation: Series 0 cards were made available for purchase from the official Topps website on September 30, 2021, and were to be available for sale until October 14, 2021; a total of 15 days.
Due to heavy demand, the Topps website ended up crashing on several occasions throughout the first hour of its launch. All 50,000 boxes were sold within that first hour of release, despite all of the website issues.